/* Revision 3331: factory first, consistent engineering art. */
.btm-foundry-hero{position:relative;isolation:isolate;min-height:790px;min-height:min(880px,calc(100svh - 110px));padding:74px var(--pad) 145px;background:#151b1b;color:#fff;overflow:hidden}
.btm-foundry-scene,.btm-foundry-shade{position:absolute;inset:0;z-index:-2}.btm-foundry-scene img,.btm-melt-animation{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.btm-foundry-scene img{filter:brightness(.88)}.btm-foundry-shade{z-index:-1;background:linear-gradient(90deg,rgba(9,17,18,.91),rgba(9,17,18,.62) 38%,rgba(9,17,18,0) 72%),linear-gradient(0deg,#10191b,transparent 30%)}
.btm-foundry-copy{max-width:820px}.btm-foundry-copy>.eyebrow{color:#d4d8d5;display:flex;gap:13px;align-items:center;font-size:10px;letter-spacing:.16em}.btm-foundry-copy>.eyebrow:before{content:'';width:7px;height:7px;background:#cf4c3f;border-radius:50%}.btm-foundry-copy h1{font:500 clamp(70px,7.5vw,116px)/1.01 var(--head);letter-spacing:-.035em;margin:34px 0 25px;color:#f5f4ed}.btm-foundry-copy h1 em{font-style:normal;color:#ef6250;font-size:.81em;white-space:nowrap}.btm-foundry-copy>p{max-width:485px;font-size:14px;line-height:1.85;color:#d5d8d5}.btm-foundry-actions{display:flex;gap:32px;align-items:center;flex-wrap:wrap;margin-top:29px}.btm-foundry-actions .button{min-width:220px;justify-content:space-between;gap:22px}.btm-foundry-actions .text-link{color:#fff;border-color:#ffffff70}.btm-foundry-bottom{position:absolute;bottom:0;left:var(--pad);right:var(--pad);min-height:96px;display:flex;gap:35px;align-items:center;justify-content:space-between;border-top:1px solid #ffffff38;font-size:9px;letter-spacing:.07em}.btm-foundry-bottom>span{color:#c0c8c5;line-height:1.7}.btm-foundry-bottom strong{font-size:11px;color:#eee;font-weight:500;letter-spacing:0}.btm-foundry-bottom>a{color:#eee;display:flex;align-items:center;gap:25px}.btm-foundry-bottom>a span{font-size:25px}.btm-motion-toggle{background:none;border:1px solid #ffffff42;color:#eee;padding:11px 14px;font:inherit;display:flex;gap:10px;cursor:pointer}.btm-motion-toggle:hover{border-color:#fff}
.melt-halo{fill:none;stroke:#fff;stroke-width:23;filter:url(#melt-glow);opacity:.2;animation:melt-pulse 2.2s ease-in-out infinite}.melt-stream{fill:none;stroke:#fff;stroke-width:6;stroke-linecap:round;stroke-dasharray:5 20 37 23;animation:melt-flow 1.1s linear infinite;opacity:.56}.melt-stream.second{stroke-width:3;stroke-dasharray:18 36;animation-duration:.83s;animation-delay:-.4s;opacity:.35}.melt-pool{fill:#fff;filter:url(#melt-glow);opacity:.28;animation:melt-pulse 1.9s ease-in-out infinite alternate}.melt-spark{fill:#fff;transform-box:view-box;animation:melt-spark var(--spark-time) ease-out infinite;animation-delay:var(--spark-delay);opacity:0}
@keyframes melt-flow{to{stroke-dashoffset:-85}}@keyframes melt-pulse{50%{opacity:.48}}@keyframes melt-spark{0%{opacity:0;transform:translate(0,0)}15%{opacity:.8}85%,100%{opacity:0;transform:translate(var(--spark-x),var(--spark-y))}}
.btm-foundry-hero.is-paused .btm-melt-animation *,.btm-foundry-hero.is-offscreen .btm-melt-animation *{animation-play-state:paused!important}
.btm-type-foot .btm-catalogue-cta{min-width:240px;justify-content:space-between;color:white;background:#c94132;min-height:58px}.btm-factory-backdrop{transform:scaleX(-1);object-position:center}.btm-factory-numbers:before{background:linear-gradient(90deg,#0b181955,transparent 70%),linear-gradient(0deg,#13252360,transparent 60%)}.btm-factory-caption{max-width:42%}.btm-factory-caption>span{display:block;font-size:11px;color:#d7dfdb}.btm-factory-sign{display:block;width:125px;height:auto;object-fit:contain;margin-top:48px;opacity:.92;filter:drop-shadow(0 8px 20px #0005)}.btm-number-main strong{font-size:91px;color:#c94132;white-space:nowrap;letter-spacing:-.06em}.btm-number-main strong small{font-size:25px;letter-spacing:0}.btm-number-main strong>span{font-size:32px;letter-spacing:-.03em;margin-left:7px}.btm-number-bars strong{white-space:nowrap}.btm-number-panel>p{max-width:none}.btm-number-panel{width:365px}
.btm-documents{background:#e9ece3}.btm-documents-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.btm-document{display:block;min-width:0;color:#182525;text-decoration:none}.btm-document-sheet{display:flex;align-items:center;justify-content:center;aspect-ratio:450/638;padding:0;position:relative;transition:transform .3s}.btm-document-sheet img{height:100%;width:100%;object-fit:contain;filter:drop-shadow(0 7px 9px #18252521)}.btm-document>span:last-child{position:relative;display:block;border-top:1px solid #aeb8a8;margin-top:20px;padding:16px 30px 0 0}.btm-document small{display:block;font-size:9px;letter-spacing:.1em;color:#687565;margin-bottom:8px}.btm-document strong{font:500 21px/1.2 var(--head)}.btm-document i{position:absolute;right:0;top:28px;color:#c94132;font:normal 27px/1 var(--head)}.btm-document:hover .btm-document-sheet{transform:translateY(-5px)}
.btm-brand-heading{display:grid;grid-template-columns:130px 1fr auto;gap:30px;align-items:center;padding:30px 0 38px;border-bottom:1px solid #c7cbc4;margin-bottom:32px}.btm-brand-heading-mark .btm-brand-mark{width:120px;height:72px;background:none}.btm-brand-heading h1{font:500 clamp(30px,3vw,46px)/1.15 var(--head);letter-spacing:-.02em;margin:10px 0 12px;max-width:800px}.btm-brand-heading p{font-size:12px;line-height:1.65;max-width:610px;margin:0;color:#56635b}.btm-brand-heading .text-link{font-size:12px;white-space:nowrap}.btm-brand-heading .btm-eyebrow{font-size:9px}
.btm-chain-hero-art .btm-detailed-orbit{background:radial-gradient(circle at 35% 25%,#df5b48,#be3b2d);width:78%;left:11%;top:8%;overflow:visible}.btm-detailed-orbit .disc-blueprint{position:absolute;inset:0;width:100%;height:100%;color:#fff9;stroke:currentColor;stroke-width:1;opacity:.9}.btm-detailed-orbit .disc-fixed{opacity:.48}.btm-detailed-orbit .disc-trace{stroke-dasharray:950;stroke-dashoffset:950;animation:btm-blueprint-draw 9s ease-in-out infinite;opacity:.6}.btm-detailed-orbit .disc-arc{transform-origin:300px 300px;animation:btm-orbit-turn 20s linear infinite;stroke-width:2}.btm-detailed-orbit:before{inset:-20px;border-color:#52635733}.btm-detailed-orbit:after{inset:-37px;border-color:#52635714;border-style:dashed}
@keyframes btm-blueprint-draw{0%,10%{stroke-dashoffset:950}45%,85%{stroke-dashoffset:0}100%{stroke-dashoffset:-950}}@keyframes btm-orbit-turn{to{transform:rotate(360deg)}}
.btm-render-stage{position:relative;width:100%;height:450px;z-index:1;pointer-events:none}.btm-section-render{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;transform:translateY(10px) scale(.94);transition:opacity .6s ease,transform .9s ease;filter:drop-shadow(0 18px 16px #18252520)}.btm-section-render.is-active{opacity:1;transform:translateY(0) scale(1)}.btm-parts-carousel .btm-chain-art-tag{bottom:40px}.btm-carousel-controls{position:absolute;z-index:3;bottom:0;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:15px}.btm-carousel-dots{display:flex;gap:2px}.btm-carousel-dots button{width:32px;height:32px;border:0;background:none;padding:10px;cursor:pointer}.btm-carousel-dots button:after{content:'';display:block;width:12px;height:3px;background:#b4bcb3;transition:background .2s}.btm-carousel-dots button[aria-pressed=true]:after{background:#c94132}.btm-carousel-pause{width:32px;height:32px;background:none;border:1px solid #bac3b6;cursor:pointer;color:#293d36}.btm-carousel-controls button:focus-visible,.btm-motion-toggle:focus-visible{outline:2px solid #c94132;outline-offset:3px}
@media(min-width:1600px){.btm-foundry-hero{padding-top:95px;min-height:900px}.btm-foundry-copy h1{font-size:126px}.btm-foundry-copy>p{font-size:16px;max-width:550px}}
@media(max-width:1100px){.btm-foundry-hero{min-height:740px}.btm-foundry-copy h1{font-size:83px}.btm-foundry-copy>p{max-width:440px}.btm-documents-row{gap:18px}.btm-document strong{font-size:18px}.btm-brand-heading{grid-template-columns:100px 1fr;gap:22px}.btm-brand-heading>.text-link{grid-column:2;justify-self:start}.btm-brand-heading-mark .btm-brand-mark{width:95px}.btm-render-stage{height:380px}}
@media(max-width:760px){.btm-foundry-hero{padding:38px 6vw 140px;min-height:810px}.btm-foundry-scene{top:180px}.btm-foundry-scene img{object-position:65% center}.btm-foundry-scene svg{display:none}.btm-foundry-shade{background:linear-gradient(180deg,#101819 0%,#101819eb 28%,#10181955 59%,#10181944 76%,#101819 94%)}.btm-foundry-copy{max-width:none}.btm-foundry-copy>.eyebrow{font-size:8px;letter-spacing:.08em;gap:9px}.btm-foundry-copy h1{font-size:clamp(59px,14.5vw,96px);margin:28px 0 22px;line-height:1.02}.btm-foundry-copy h1 em{font-size:.69em}.btm-foundry-copy>p{font-size:12px;max-width:330px;line-height:1.75}.btm-foundry-actions{margin-top:23px;gap:20px}.btm-foundry-actions .button{min-width:210px;min-height:53px}.btm-foundry-actions .text-link{font-size:10px}.btm-foundry-bottom{min-height:115px;left:6vw;right:6vw;gap:16px;flex-wrap:wrap;align-content:center}.btm-foundry-bottom>span{width:100%;font-size:8px}.btm-foundry-bottom strong{font-size:10px}.btm-foundry-bottom>a{font-size:8px;gap:14px}.btm-motion-toggle{margin-left:auto;font-size:8px;padding:8px}.btm-type-foot .btm-catalogue-cta{margin-top:20px;display:flex}.btm-factory-caption{max-width:none}.btm-factory-caption p{font-size:30px}.btm-factory-sign{position:absolute;right:0;bottom:0;width:70px;margin:0;opacity:.85}.btm-factory-caption>span:last-of-type{max-width:70%;line-height:1.7}.btm-factory-backdrop{object-position:65% center}.btm-number-panel{width:320px}.btm-number-main strong{font-size:86px}.btm-documents-row{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:6px 3px 22px}.btm-document{flex:0 0 70%;scroll-snap-align:start}.btm-document strong{font-size:22px}.btm-brand-heading{grid-template-columns:75px 1fr;gap:16px;padding:16px 0 28px}.btm-brand-heading-mark .btm-brand-mark{width:70px;height:55px}.btm-brand-heading h1{font-size:30px;overflow-wrap:anywhere}.btm-brand-heading p{font-size:11px}.btm-brand-heading .btm-eyebrow{font-size:7px}.btm-render-stage{height:310px}.btm-chain-hero-art .btm-detailed-orbit{top:8%;width:72%;left:14%}.btm-parts-carousel .btm-chain-art-tag{bottom:40px;font-size:8px}.btm-chain-art-tag strong{font-size:10px}.btm-carousel-controls{bottom:-6px}.btm-chain-hero-art{margin-bottom:20px}}
@media(prefers-reduced-motion:reduce){.btm-melt-animation *,.btm-detailed-orbit *{animation:none!important}.melt-stream{stroke-dasharray:none;opacity:.18}.btm-section-render,.btm-document-sheet{transition:none!important}}html.reduce-motion .btm-melt-animation *,html.reduce-motion .btm-detailed-orbit *{animation:none!important}html.reduce-motion .btm-section-render{transition:none!important}

@media(max-width:760px){.btm-foundry-scene{width:180%;left:-75%;right:auto}.btm-foundry-scene img{object-position:center}.btm-foundry-scene svg{display:block}}

.btm-carousel-controls{left:auto;right:0;bottom:0;background:#f7f6ef;padding:2px 8px;border:1px solid #c7cbc4}.btm-factory-sign{opacity:.76}

/* Selective hot-metal colour: grayscale scene, warm stream and sparks only. */
.btm-foundry-hero .melt-halo{stroke:#ff6516;opacity:.3}
.btm-foundry-hero .melt-stream{stroke:url(#melt-temperature);opacity:.66}
.btm-foundry-hero .melt-stream.second{stroke:#ffd767;opacity:.5}
.btm-foundry-hero .melt-pool{fill:#ffb72c;opacity:.42}
.btm-foundry-hero .melt-spark{fill:#ffc74d;filter:drop-shadow(0 0 2px #ff6500);animation-name:btm-hot-spark}
.btm-foundry-hero .melt-spark:nth-of-type(3n){fill:#ffe78e}
.btm-foundry-hero .melt-spark:nth-of-type(3n + 1){fill:#ff8525}
@keyframes btm-hot-spark{0%{opacity:0;transform:translate(0,0);fill:#fff0a6}15%{opacity:.95;fill:#ffe274}50%{fill:#ff9a26}85%,100%{opacity:0;transform:translate(var(--spark-x),var(--spark-y));fill:#e84c19}}
@media(prefers-reduced-motion:reduce){.btm-foundry-hero .melt-stream{opacity:.18}}

/* 2026-09-29: business copy and denser, ballistic hot-metal sparks. */
.btm-corporate-home .btm-foundry-copy{max-width:760px}
.btm-corporate-home .btm-foundry-copy h1{font-size:clamp(62px,6.4vw,102px);line-height:1.04;letter-spacing:-.025em}
.btm-corporate-home .btm-foundry-copy h1 em{font-size:.91em}
.btm-corporate-home .btm-foundry-copy p{max-width:490px}
.btm-corporate-home .b-service-row p{max-width:360px}
.btm-corporate-home .btm-number-panel h2{font-size:clamp(38px,3.8vw,62px);line-height:1.04}
.btm-corporate-home .process-b-visual .photo-title{font-size:clamp(42px,4.7vw,76px)}
.btm-foundry-hero .melt-spark{animation-name:btm-hot-spark-dense;animation-timing-function:linear}
@keyframes btm-hot-spark-dense{
  0%{opacity:0;transform:translate(0,0);fill:#fff0a6}
  8%{opacity:1;fill:#ffe891}
  35%{opacity:.95;transform:translate(calc(var(--spark-x) * .40),var(--spark-apex));fill:#ffc34d;animation-timing-function:ease-in}
  78%{opacity:.45;fill:#ff8425}
  96%,100%{opacity:0;transform:translate(var(--spark-x),var(--spark-end));fill:#ec4618}
}
@media(min-width:1600px){.btm-corporate-home .btm-foundry-copy h1{font-size:110px}}
@media(max-width:1100px) and (min-width:761px){.btm-corporate-home .btm-foundry-copy h1{font-size:70px}}
@media(max-width:760px){
 .btm-corporate-home .btm-foundry-copy h1{font-size:clamp(42px,10.8vw,73px);line-height:1.08;margin:28px 0 23px}
 .btm-corporate-home .btm-foundry-copy h1 em{font-size:1em}
 .btm-corporate-home .btm-foundry-copy p{max-width:340px}
 .btm-corporate-home .btm-number-panel h2{font-size:clamp(34px,8.7vw,54px)}
 .btm-corporate-home .process-b-visual .photo-title{font-size:clamp(32px,8.4vw,48px)}
}